/*
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 */

package honework.dome04;

/**
 *  严仁声 2010404124
 * @author Administrator
 */
public class CheckPhone {
    public static void main(String[] args) {
        String mobile="1320202020";
        boolean flag=true;
        if(mobile.length()!=11){
            flag=false;
            if(!(mobile.startsWith("13")||mobile.startsWith("15"))){
               flag=false;
        }
          String numstr="0123456789";
          for(int i=0;i<mobile.length();i++){
              char c=mobile.charAt(i);
              int temp=numstr.indexOf(c);
              if(temp<0){
                  flag=false;
                  break;
            
              }
          }
          
          if(flag)
          {
              System.out.println("是合法的手机号码");
              
          }
          else
          {
              System.out.println("不是合法的手机号码");
          }
        }
    }

}